[ofa-general] Re: [ewg] Re: [OMPI devel] Re: OMPI over ofed udapl - bugs opened

[Jeff Squyres]

On May 10, 2007, at 10:28 AM, Michael S. Tsirkin wrote:

>> What is the advantage of this approach?
>
> Current ipoib cm uses this approach to simplify the implementation.
> Overhead seems insignificant.

I think MPI's requirements are a bit different than IPoIB.  See  
Gleb's response. It is not uncommon for MPI apps to have connections  
open to many peers simultaneously.  Registered memory / internal  
buffering usage is a Big Deal in the MPI / HPC community.

-- 
Jeff Squyres
Cisco Systems